EPA Lays Out Conditions For Petroleum Vapor Screening Ahead Of Guide

EPA is beginning to outline the conditions when screening and mitigation are needed at petroleum vapor intrusion (PVI) sites even ahead of finalizing planned guidance on the issue, suggesting in a recent paper that sites where building foundations are touching petroleum plumes or where anaerobic soil conditions exist require special attention. Petroleum hydrocarbons typically degrade more quickly than chlorinated hydrocarbons, and thus are less likely to pose a vapor intrusion risk, a point industry has made in arguing that petroleum...